To squeeze every drop of performance from your Windows 10 ARM qcow2, apply these tweaks.
qemu-system-aarch64 \
-machine virt,highmem=off \
-cpu host \
-accel hvf \
-m 4G \
-bios /opt/homebrew/share/qemu/edk2-aarch64-code.fd \
-drive file=win10arm.qcow2,format=qcow2,if=virtio \
-drive file=virtio-arm64.iso,if=virtio,media=cdrom \
-netdev user,id=net0 \
-device virtio-net-device,netdev=net0 \
-device ramfb \
-vga none \
-usb -device usb-tablet \
-rtc base=localtime
Note: Replace virtio-arm64.iso with Fedora’s virtio-win ARM64 drivers.
Prepared for internal technical review. Not an official Microsoft document.
Guide to Windows 10 on ARM Virtualization using QCOW2 Windows 10 on ARM is a specialized version of the OS designed to run on power-efficient ARM64 processors. For developers and enthusiasts, running this in a virtual machine (VM) typically involves the QCOW2 (QEMU Copy-On-Write) disk format, which is the standard for the QEMU and KVM hypervisors. 1. Understanding the Licensing & ISO Dilemma
Unlike standard x86 Windows, Microsoft does not provide a direct retail ISO for Windows 10 on ARM.
Official Channels: You can sometimes find VHDX (not QCOW2) images via the Windows Insider Preview program, though these have largely transitioned to Windows 11.
Unofficial Methods: Many users use UUP dump to generate an ISO by downloading files directly from Microsoft’s update servers.
Legacy Support: Windows 10 on ARM is nearing its end-of-support in October 2025, and it lacks the robust x64 application emulation found in Windows 11. 2. Creating a QCOW2 Image
To run Windows 10 ARM on a Linux host (or Windows via WSL2), you must first create the virtual disk.
Command: Use the qemu-img tool to create a dynamically expanding disk: qemu-img create -f qcow2 win10_arm.qcow2 64G Use code with caution. Copied to clipboard
Optimization: Experts suggest a cluster size of 2 MB for better performance during I/O operations. 3. Essential Requirements for Virtualization
Virtualizing ARM64 requires specific firmware and drivers to function correctly:
Windows 10 ARM QCOW2: The Ultimate Virtualization Guide Using a Windows 10 ARM QCOW2 image is the most efficient way to run Windows on ARM-based hardware (like Apple Silicon M-series chips or Raspberry Pi) or to emulate the ARM architecture on standard x86 systems. This guide covers everything from understanding the format to setting up your own virtual machine. What is a Windows 10 ARM QCOW2 Image?
A QCOW2 (QEMU Copy-On-Write version 2) file is a virtual disk format primarily used by the QEMU hypervisor.
Thin Provisioning: Unlike "raw" images, a QCOW2 file only takes up space on your physical drive for the data actually written inside the VM.
Snapshots: It supports built-in snapshots, allowing you to save the state of your Windows 10 ARM environment and roll back if an update or app installation fails.
ARM64 Architecture: While standard Windows 10 is built for x86-64 (Intel/AMD), the ARM64 version is designed for mobile and energy-efficient processors. How to Get a Windows 10 ARM QCOW2 Image There are two main ways to acquire a working image: 1. Download Pre-built Images
Several community projects provide patched or "ready-to-boot" QCOW2 images for testing:
Internet Archive: You can find older Windows 10 for ARM64 ISOs that can be converted or installed directly into a QCOW2 disk.
GitHub Projects: Tools like raspiduino/waq provide scripts to automate the download and configuration of Windows 10 for ARM on QEMU. 2. Create Your Own Image (Recommended)
Building your own image ensures you have the latest updates and correct drivers. raspiduino/waq: Run Windows 10 for ARM64 on QEMU - GitHub
Here’s a structured summary of relevant information regarding Windows 10 on ARM in QCOW2 format, typically used with QEMU/KVM on Linux/aarch64 hosts.
Windows 10 on ARM is not publicly downloadable via Microsoft’s normal consumer ISO pages. It is distributed through:
Legal Note: You need a valid Windows 10 license. The ARM64 version uses the same license key as x86/x64 Windows 10.